These experiments are designed to detect theoretically proposed and astrophysically motivated weakly-interacting-sub-eV-particles (WISP) [1]}. This experimental approach is characterized by shining a light source at an opaque wall. Before the wall some photons will convert to WISPs and these WISPs will traverse the wall into the regeneration side of the experiment [2]}. There, the WISPs will reconvert to photons which are measured with a single photon detection scheme. Optical cavities have been used before the wall to increase the number of photons creating WISPs, such as in the Any Light Particle Search I (ALPS I). A cavity can also be used after the wall to increase the probability that WISPs will reconvert to a photons. The cavities before and after the wall will be referred to as the production cavity and the regeneration cavity, respectively. LSW experiments typically include dipole magnets in their design to search for axion-like particles.
